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<FONT color="green">001</FONT>    package metaface.interaction;<a name="line.1"></a>
<FONT color="green">002</FONT>    <a name="line.2"></a>
<FONT color="green">003</FONT>    import javax.xml.parsers.*;<a name="line.3"></a>
<FONT color="green">004</FONT>    import org.xml.sax.*;<a name="line.4"></a>
<FONT color="green">005</FONT>    import org.xml.sax.helpers.*;<a name="line.5"></a>
<FONT color="green">006</FONT>    import java.util.*;<a name="line.6"></a>
<FONT color="green">007</FONT>    import java.io.*;<a name="line.7"></a>
<FONT color="green">008</FONT>    /**<a name="line.8"></a>
<FONT color="green">009</FONT>     *  DMTLParser takes DMTL documents and transforms them into an internal<a name="line.9"></a>
<FONT color="green">010</FONT>     *  storage format (KnowledgeBase). This format is then used by the<a name="line.10"></a>
<FONT color="green">011</FONT>     *  InteractionManager. DMTL is defined by the following DMTL structure: <a name="line.11"></a>
<FONT color="green">012</FONT>     *  &lt;IMG SRC="../../resources/DMTL_h.jpg"/>&lt;BR/><a name="line.12"></a>
<FONT color="green">013</FONT>     *  &lt;IMG SRC="../../resources/DMTL_a.jpg"/>&lt;BR/><a name="line.13"></a>
<FONT color="green">014</FONT>     *  See the DMTL &lt;A HREF="../../resources/DMTL.dtd">DTD&lt;/a> or and <a name="line.14"></a>
<FONT color="green">015</FONT>     *  &lt;A HREF="../../resources/dmtl_example.xml">example file&lt;/a> .<a name="line.15"></a>
<FONT color="green">016</FONT>     *<a name="line.16"></a>
<FONT color="green">017</FONT>     *@author     Simon Beard <a name="line.17"></a>
<FONT color="green">018</FONT>     *@version    1.0<a name="line.18"></a>
<FONT color="green">019</FONT>     *@see        InteractionManager<a name="line.19"></a>
<FONT color="green">020</FONT>     *@see        DMTLTagReader<a name="line.20"></a>
<FONT color="green">021</FONT>     *@see        KnowledgeBase<a name="line.21"></a>
<FONT color="green">022</FONT>     */<a name="line.22"></a>
<FONT color="green">023</FONT>    public class DMTLParser {<a name="line.23"></a>
<FONT color="green">024</FONT>    <a name="line.24"></a>
<FONT color="green">025</FONT>            /**<a name="line.25"></a>
<FONT color="green">026</FONT>             *  The DMTL files in memory<a name="line.26"></a>
<FONT color="green">027</FONT>             */<a name="line.27"></a>
<FONT color="green">028</FONT>            private Vector knowledgebases;<a name="line.28"></a>
<FONT color="green">029</FONT>            /**<a name="line.29"></a>
<FONT color="green">030</FONT>             *  The SAX tag parser<a name="line.30"></a>
<FONT color="green">031</FONT>             */<a name="line.31"></a>
<FONT color="green">032</FONT>            private DMTLTagReader dmtltagreader = null;<a name="line.32"></a>
<FONT color="green">033</FONT>            /**<a name="line.33"></a>
<FONT color="green">034</FONT>             *  The macros within the DMTL files<a name="line.34"></a>
<FONT color="green">035</FONT>             */<a name="line.35"></a>
<FONT color="green">036</FONT>            private Macros macros;<a name="line.36"></a>
<FONT color="green">037</FONT>    <a name="line.37"></a>
<FONT color="green">038</FONT>    <a name="line.38"></a>
<FONT color="green">039</FONT>            /**<a name="line.39"></a>
<FONT color="green">040</FONT>             *  Creates new DMTLMemoryParser<a name="line.40"></a>
<FONT color="green">041</FONT>             *<a name="line.41"></a>
<FONT color="green">042</FONT>             *@param  filenames  The DMTL files to parse<a name="line.42"></a>
<FONT color="green">043</FONT>             */<a name="line.43"></a>
<FONT color="green">044</FONT>            public DMTLParser(Vector filenames) {<a name="line.44"></a>
<FONT color="green">045</FONT>                    int i;<a name="line.45"></a>
<FONT color="green">046</FONT>                    boolean validation = true;<a name="line.46"></a>
<FONT color="green">047</FONT>                    int numFiles = filenames.size();<a name="line.47"></a>
<FONT color="green">048</FONT>    <a name="line.48"></a>
<FONT color="green">049</FONT>                    knowledgebases = new Vector();<a name="line.49"></a>
<FONT color="green">050</FONT>    <a name="line.50"></a>
<FONT color="green">051</FONT>                    // Set up the parser<a name="line.51"></a>
<FONT color="green">052</FONT>                    SAXParserFactory spf = SAXParserFactory.newInstance();<a name="line.52"></a>
<FONT color="green">053</FONT>                    spf.setValidating(validation);<a name="line.53"></a>
<FONT color="green">054</FONT>                    XMLReader xmlReader = null;<a name="line.54"></a>
<FONT color="green">055</FONT>    <a name="line.55"></a>
<FONT color="green">056</FONT>                    try {<a name="line.56"></a>
<FONT color="green">057</FONT>    <a name="line.57"></a>
<FONT color="green">058</FONT>                            // Create a JAXP SAXParser<a name="line.58"></a>
<FONT color="green">059</FONT>                            SAXParser saxParser = spf.newSAXParser();<a name="line.59"></a>
<FONT color="green">060</FONT>    <a name="line.60"></a>
<FONT color="green">061</FONT>                            // Get the encapsulated SAX XMLReader<a name="line.61"></a>
<FONT color="green">062</FONT>                            xmlReader = saxParser.getXMLReader();<a name="line.62"></a>
<FONT color="green">063</FONT>                    } catch (Exception e) {<a name="line.63"></a>
<FONT color="green">064</FONT>                            System.err.println(e);<a name="line.64"></a>
<FONT color="green">065</FONT>                            e.printStackTrace();<a name="line.65"></a>
<FONT color="green">066</FONT>                    }<a name="line.66"></a>
<FONT color="green">067</FONT>    <a name="line.67"></a>
<FONT color="green">068</FONT>                    // Set an ErrorHandler before parsing<a name="line.68"></a>
<FONT color="green">069</FONT>                    xmlReader.setErrorHandler(new DMTLErrorHandler(System.err));<a name="line.69"></a>
<FONT color="green">070</FONT>                    try {<a name="line.70"></a>
<FONT color="green">071</FONT>    <a name="line.71"></a>
<FONT color="green">072</FONT>                            // Tell the XMLReader to parse the XML document<a name="line.72"></a>
<FONT color="green">073</FONT>                            for (i = 0; i &lt; numFiles; i++) {<a name="line.73"></a>
<FONT color="green">074</FONT>                                    if (DMTLDebugger.debug) {<a name="line.74"></a>
<FONT color="green">075</FONT>                                            System.out.println("parsing file " + (String) filenames.elementAt(i));<a name="line.75"></a>
<FONT color="green">076</FONT>                                    }<a name="line.76"></a>
<FONT color="green">077</FONT>    <a name="line.77"></a>
<FONT color="green">078</FONT>                                    // Set the ContentHandler of the XMLReader<a name="line.78"></a>
<FONT color="green">079</FONT>                                    dmtltagreader = new DMTLTagReader((String) filenames.elementAt(i));<a name="line.79"></a>
<FONT color="green">080</FONT>                                    xmlReader.setContentHandler(dmtltagreader);<a name="line.80"></a>
<FONT color="green">081</FONT>                                    xmlReader.parse(convertToFileURL((String) filenames.elementAt(i)));<a name="line.81"></a>
<FONT color="green">082</FONT>                                    knowledgebases.add(dmtltagreader.getKnowledgeBase());<a name="line.82"></a>
<FONT color="green">083</FONT>                            }<a name="line.83"></a>
<FONT color="green">084</FONT>                    } catch (SAXException e) {<a name="line.84"></a>
<FONT color="green">085</FONT>                            System.err.println("XML error parsing DMTL file");<a name="line.85"></a>
<FONT color="green">086</FONT>                            e.printStackTrace();<a name="line.86"></a>
<FONT color="green">087</FONT>                    } catch (IOException e) {<a name="line.87"></a>
<FONT color="green">088</FONT>                            System.err.println("IO error parsing DMTL file");<a name="line.88"></a>
<FONT color="green">089</FONT>                            e.printStackTrace();<a name="line.89"></a>
<FONT color="green">090</FONT>                    }<a name="line.90"></a>
<FONT color="green">091</FONT>            }<a name="line.91"></a>
<FONT color="green">092</FONT>    <a name="line.92"></a>
<FONT color="green">093</FONT>    <a name="line.93"></a>
<FONT color="green">094</FONT>            /**<a name="line.94"></a>
<FONT color="green">095</FONT>             *  Constructor for the DMTLParser object<a name="line.95"></a>
<FONT color="green">096</FONT>             */<a name="line.96"></a>
<FONT color="green">097</FONT>            public DMTLParser() { }<a name="line.97"></a>
<FONT color="green">098</FONT>    <a name="line.98"></a>
<FONT color="green">099</FONT>    <a name="line.99"></a>
<FONT color="green">100</FONT>            /**<a name="line.100"></a>
<FONT color="green">101</FONT>             *  Gets the knowledge bases parsed from the DMTL documents<a name="line.101"></a>
<FONT color="green">102</FONT>             *<a name="line.102"></a>
<FONT color="green">103</FONT>             *@return    The knowledge bases<a name="line.103"></a>
<FONT color="green">104</FONT>             */<a name="line.104"></a>
<FONT color="green">105</FONT>            public Vector getKnowledgeBases() {<a name="line.105"></a>
<FONT color="green">106</FONT>                    return (knowledgebases);<a name="line.106"></a>
<FONT color="green">107</FONT>            }<a name="line.107"></a>
<FONT color="green">108</FONT>    <a name="line.108"></a>
<FONT color="green">109</FONT>    <a name="line.109"></a>
<FONT color="green">110</FONT>            /**<a name="line.110"></a>
<FONT color="green">111</FONT>             *  Convert from a filename to a file URL.<a name="line.111"></a>
<FONT color="green">112</FONT>             *<a name="line.112"></a>
<FONT color="green">113</FONT>             *@param  filename  The filename to turn to an URL<a name="line.113"></a>
<FONT color="green">114</FONT>             *@return           The URL<a name="line.114"></a>
<FONT color="green">115</FONT>             */<a name="line.115"></a>
<FONT color="green">116</FONT>            public static String convertToFileURL(String filename) {<a name="line.116"></a>
<FONT color="green">117</FONT>                    String path = new File(filename).getAbsolutePath();<a name="line.117"></a>
<FONT color="green">118</FONT>                    if (File.separatorChar != '/') {<a name="line.118"></a>
<FONT color="green">119</FONT>                            path = path.replace(File.separatorChar, '/');<a name="line.119"></a>
<FONT color="green">120</FONT>                    }<a name="line.120"></a>
<FONT color="green">121</FONT>                    if (!path.startsWith("/")) {<a name="line.121"></a>
<FONT color="green">122</FONT>                            path = "/" + path;<a name="line.122"></a>
<FONT color="green">123</FONT>                    }<a name="line.123"></a>
<FONT color="green">124</FONT>                    return "file:" + path;<a name="line.124"></a>
<FONT color="green">125</FONT>            }<a name="line.125"></a>
<FONT color="green">126</FONT>    }<a name="line.126"></a>




























































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